[Password Manager] Convert |pending_login_managers_| to an array of scoped_refptr

ios/chrome/browser/passwords/ios_chrome_save_password_infobar_delegate.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef IOS_CHROME_BROWSER_PASSWORDS_IOS_CHROME_SAVE_PASSWORD_INFOBAR_DELEGATE_H_
 #define IOS_CHROME_BROWSER_PASSWORDS_IOS_CHROME_SAVE_PASSWORD_INFOBAR_DELEGATE_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 12 matching lines @@
 // IOSChromeSavePasswordInfoBarDelegate while the user makes up their mind
 // with the "save password" infobar.
 class IOSChromeSavePasswordInfoBarDelegate
     : public IOSChromePasswordManagerInfoBarDelegate {
  public:
   // Creates the infobar for |form_to_save| and adds it to |infobar_manager|.
   // |is_smart_lock_enabled| controls the branding string.
   static void Create(
       bool is_smart_lock_branding_enabled,
       infobars::InfoBarManager* infobar_manager,
-      std::unique_ptr<password_manager::PasswordFormManager> form_to_save);
+      scoped_refptr<password_manager::PasswordFormManager> form_to_save);
 
   ~IOSChromeSavePasswordInfoBarDelegate() override;
 
  private:
   IOSChromeSavePasswordInfoBarDelegate(
       bool is_smart_lock_branding_enabled,
-      std::unique_ptr<password_manager::PasswordFormManager> form_to_save);
+      scoped_refptr<password_manager::PasswordFormManager> form_to_save);
 
   // ConfirmInfoBarDelegate implementation.
   infobars::InfoBarDelegate::InfoBarIdentifier GetIdentifier() const override;
   base::string16 GetMessageText() const override;
   base::string16 GetButtonLabel(InfoBarButton button) const override;
   bool Accept() override;
   bool Cancel() override;
 
   DISALLOW_COPY_AND_ASSIGN(IOSChromeSavePasswordInfoBarDelegate);
 };
 
 #endif  // IOS_CHROME_BROWSER_PASSWORDS_IOS_CHROME_SAVE_PASSWORD_INFOBAR_DELEGATE_H_